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O. P. WALKER & M. RANSOM.

PERMUTATION PADLOUK.

N0. 330,647. Patented Nov, 17, 1885.

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CHARLES F. "WALKER, OF OAK PARK, AND MARTIN RANSOM, OF CHICAGO,ILLINOIS; SAID RANSOM ASSIGNOR TO SAID \VALKER.

PERMUTATION-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 330.647, dated November17, 1885.

Application filed March 2, 1885. Serial No:157,505.

To all whom it may concern.-

Be it known that we, CHARLES F. \VALKER, a citizen of the United States,residing at Oak Park, in the county of Cook and State of Illinois, andMARTIN RANsoM, a subject of the Queen of Great Britain, residing atChicago, in the county of Cook and State of Illinois, have invented acertain new and Improved Combination-Lock; and we hereby declare thefollowing to be a full, clear, and exact description of the same.

It is our object to provide a combination or permutation lock suitablefor all the purposes to which such locks are applicable,whioh shall beaccurate in its operation and of comparatively simple construction;'andto this end our invention consists, first, in effecting the locking ofthe bolt by means of tumblers or disks of peculiar construction arrangedto be turned independently of each other about a common center; second,in providing disks having each a segment removed from its periphery,whereby when the straight portions of the disks shall be in line witheach other and adjacent to the bolt the latter shall be unlocked, andlocked when the disks shall be in any other position with relation toeach other or to the bolt, and, third, in providing a key for operatingthe disks or tumblers, and which display the numbers to indicate thecombinations to lie within the receptacle containing the lockingmechanism.

Our invention further consists in certain details of construction andcombinations of parts, all as hereinafter particularly set forth.

Referring to the drawings, Figure 1 is a front elevation of ourinvention applied in the form of a padlock; Fig. 2, a similar viewhaving the covering-plate removed to display details Fig. 3, a similarview having the covering-plate and the combined dial and key removed todisplay other details, and showing the bolt locked;-Fig. 4, a similarview having the covering-plate, combined dial and key, and first tumblerremoved to display the remaining tumblers; Fig. 5, a similar view havingthe covering-plate, combined dial and key, and first and second tumblersremoved to show the lowest tumbler in position; Fig. 6, a plan viewshowing the interior of the shell of the padlock for containing theoperat- (No model.)

ing mechanism; Fig. 7, a sectional view taken on the line 7 7 of Fig. 1,and viewed in the direction of the arrows; and Figs. 8, 9,10, and 11plan views of details.

Although to illustrate our invention we have chosen to show itsapplication in the form of a padlock, such choice has no specialsignificance, since any other form of lock, whether l'or a drawer, adoor, or the like might have been selected without affording or avoidingadditional advantages of display. Because, therefore, a padlock is usedto illustrate our invention, it is not intended to imply that this isthe only form of lock to which it may be applied, or even that it is theform in which the best results are obtained from its use, since it isequally useful for all the purposes to which combinatioulocks areadapted.

A is the bed-plate, comprising asolid piece of metal of the form shownin the drawings, or of any other desired form, and of suitablethickness. Toward the center of one 'of its sides the plate A ishollowed out to form a cylindrical well, if, having a central opening,8, in its bottom, and a longitudinal notch, r, in one side, and openingon its inner side into a longitudinal recess, q, preferably of the samedepth as the well.

B is the bolt, which slides, when unlocked, within the recess q, and isrecessed or concaved, as represented at 19, Fig. 5, on its inner edge toform, when locked, as shown in Figs. 3 and 4, the inner side of thecylinder composing the well. In the form of a padlock, as illustrated,the bolt B is bent toward its rear extremity, as shown at-x, to form,when locked with the rear end of the bed-plate A, concaved for thepurpose, as shown at x, a ring, 0, to surround the object to be secured,to which the device is attached for'the purpose, and the longitudinalplay of the bolt B, when unlocked, is controlled by a pin, a, forming astop, within a recess, n, formed on the rear edge of the bolt.

0, D,and E are annular disks or tumblers the peripheries of whichcorrespond in shape with the form of the well t without the concavity 1)in the boltthat is to say, a segment is cut of the same dimensions fromeach disk to produce upon it a straight edge to extend across andcoincide transversely with the lateral opening of the well it. Theopening in the tumbler O is circular, with a lateral recess, 0'. Theopening'in the tumbler D is partly circular, with stops d and d formedin one side; and that in the tumbler E is circular, with a lip or stop,6, extending toward the center.

F is an annular washer, of which three are provided, each having itsperiphery formed to correspond in shape with the peripheries of thetumblers, and provided with a peripheral projection, m, to fit withinthe notch r of the well t when the tumblers are adjusted in themannerhereinafter described.

G is a dial-plate having an opening, Z, in its center, and a pin, K,projecting fromits under side to one side of the central opening, Z.

H is the covering-plate, provided with a concavity, as, to coincide,when adjusted, with the concaved portion 0: of the bed-plate A, andhaving rivet-holes i, to receive rivets i, which project from the bedplate, and an opening, h, to coincide, when the plate is adjusted, withthe opening 8 in the bottom of the well, and, also, an opening, belowwhich pass the figures on the dial-plate G in revolving the latter aboutits axis in the form of a pin, f, extending centrally through the plateH and well t. The under side of the plate H is recessed to form acircular receptacle for the dial-plate G, which projects beyond the edgeof the shell, and is milled around its periphery.

When the device is employed as a combination-lock for drawers, doors,and the like, in which application a suitable handle may be properlyconnected with the key G k, to turn it, milling of the edge may beomitted, and the dial-plate need not project beyond the edge of theshell.

In the following explanation of the manner of adjusting the operativeparts of the mechanism hereinbefore described, to produce the desiredresults one combination is described, the attainment of which willunlock the de vice. It is obvious, however, that the combination issubject to numerous changes, even with the number and form of disks ortumblers employed, by changing the order of their insertion or invertingthem, or both, though more than three tumblers of proper constructionmay be used, when, of course, thenumber of possible combinations forunlocking will be increased. Another and well-known means of changingthe combination is by changing the relative positions of the dial.

first, with its flattened edge coincident with the opening in the sideof the well. By'adjusting the key G k in a manner to cause the pin it toabut laterally against the side y of the lip e, a certain number willappear at the opening gsay the number 3. A metallic washer, F, is thenadjusted upon theinserted tumbler to coincide with the latter and tocause its projection m to enter the notch 1" in the well, and therebyrender the washer stationary. The tumbler D is then adjusted upon thewasher covering the tumbler E in a manner to coincide with the latter asto its periphery, and the pin it is caused to abut laterally against thestop d, when a certain other number will appear at the opening 9- saythe number 6. A metallic washer is then adjusted upon the tumbler D inthe manner already described of the tumbler E. The tumbler O is thenimposed upon the washer last adjusted in a manner to cause its straightedge to coincide with the straight edges of the adjusted tumblers E andD. When in this position, by inserting the pin into the recess c thenumber directly in line with the pin it will appear upon the dial at theopening g, which number in the present combination is zero, since thepin 70 is secured to the'under side of the dial-plate G on a lineextending from the zero-sign diametrically across the surface of theplate. A washer,F,is imposed upon the tumbler O in the mannerhereinbefore described of the other tumblers. With the tumblers in thepositions just described the bolt B may be moved back and forth, its

movement being limited only by the stop n. The plate H is adjusted tocover the internal mechanism, and is fastened in place by means I of therivets 2', which fit into the holes 1', and

the pin or shaftf, which extends through the opening .9 in the well tand through the opening it in the covering-plate. bolt inward to theposition shown in Figs. 2, 3, and 4 of the drawings the tumblers may beI turned without impediment by operating the :pin 70, through the mediumof the dial-plate, :which is turned by manipulating its milled edge.willhave been dist-urbed,and the curved edges Zof the tumblers, or thecurved edge of one tumbler, if only one is turned, will fit into therecessp of the bolt B and afford a stop to its ;withdrawal, whereby itwill be locked. To Iunlock it, the straight edges of the tumbler I must,to restore the combination, be presented to the concave portion 11 ofthe bolt, which .is accomplished by turning the key G k to fthe leftuntil, with the combination hereinbefore suggested, the figure 3 shallappear at the opening 9, then to the right until the gfigure 6 shall beseen, and again to the left until the figure 0 shall be presented toview By moving the When thus turned, the combination at the opening g,whereby impediment to the sliding. of the bolt will be removed.

What we claim asnew, and desire to secure by Letters Patent, is Thetumbler E isinserted into the wellt .with a bolt recessed on one side,of one or 1. In a combination-lock, the combination,

more tumblers, each comprising a disk having asegment removed from itsedge, and

means, substantially as described, for turning the tumbler or tumblers.

2. In a combination-lock, the combination, with the covered receptacleA, of a bolt, B, concaved on one edge, a well, t, opening laterally intothe concaved portion of the said bolt and rendered thereby cylindrical,and

' provided laterally with a longitudinal notch,

1', independently movable tumblers within the said well, comprisingannular disks provided with suitable stops and having each a segmentremoved from its edge, stationary washers F, interposed between the saidtumblers, and means, substantially as described, within the receptacleA, for turning the said tumblers.

3. A combination-lock comprising, in combination, a bed-plate, A, havinga well, it, a recess, q, into which the said well opens laterally, asliding bolt, B, within the recess q, and concaved on one edge tocomplete, when inserted, the necessary distance within the said recess,the cylindrical cavity forming the said well, tumblers CD Ewithin thesaid well, comprising annular disks having each a segment removed fromits edge and producing a straight portion upon the said edge to permit,when such straight portions are in vertical line adjacent to the saidbolt, movement of the latter, the said tumblers operating to preventsuch movement when one or more of the s raight portions shall be turnedfrom such vertical line, a suitable covering for the said parts, andmeans, substantially as described, for turning the said tumblers.

4. A combination-lock comprising, in combination, abed-plate, A,provided with a well, t, and a recess, q, into which the said well openslaterally, a sliding bolt, B, within the recess q and concaved on itsinner edge to complete, when inserted, the necessary distance within thesaid recess the cylindrical cavity forming the said well,independently-movable tumblers O D E within the said well, comprisingannular disks having each a segment removed from its edge to permitmovement of the bolt when the straight edges are in vertical lineadjacent to the said bolt, the said tumblers operating to prevent suchmovement when one or more of the straight edges shall be turned fromsuch vertical line, a key comprising a dial-plate, G, and pin K,extending from the under side of the said dial-plate through the saidannular disks and operating to move the said annular disks by abutmentagainst stops provided therein, and a suitable cover for the entireoperative mechanism, substantially as described.

5. A combination-lock comprising, in combination, the followingelements: a bed-plate, A, having a well, t, a longitudinal recess, (1,into which the said well opens laterally, a sliding bolt, B, within therecess q and concaved on its inner edge to complete, when inserted, thenecessary distance within the said recess, the cylindrical cavityformingthe said well, and provided with a recess, n, on its oppositeedge abutting against a suitable stop, it, and bent at one extremity toform a ring with the concave portion of the plate A, tumblers within thesaid well, comprising an annular disk, 0, having a recess, a, leadingfrom its central opening and forming a stop, an annular disk, D, havingstops d and (1 formed within its central opening, and an annular disk,E, having a projection, 6, extending inward from its central opening andforming a stop, each annular disk having a segment removed from itsedge, a key comprising a dial-plate, G, and a pin, K, extending from theunder side ofthe said dial-plate through the said annular disks andoperating to move the said disks by abutment againstthe said stopstherein,acovering plate, H, secured upon the said bed-plate A, andconcaved at one end, and recessed on its under side to receive thedial-plate G, and provided with an opening, 9, underneath which thenumbers on the said dial-plate shall pass in moving the same, and ashaft, f, passing centrallythrough the said well and secured at oppositeextremities to the said bed-plate A and covering-plate H, the wholebeing constructed and arranged to operate substantially as described.

CHARLES F. WALKER. MARTIN RANSOM. In presence of- MASON BROSS, EDWARDTHORPE.

